Skip the auto shop - Our mechanics make house calls

Q: My car is still overheating after I replaced the thermostat

asked by on

my Durango is overheating at low rpms but wen I stomp on it or Rev the engine to higher rpms it the temp gauge goes down I replaced the thermostat but it keeps over heating it's not leaking coolant so I don't know what is causing it to over heat

My car has 200000 miles.
My car has an automatic transmission.

A: Let’s focus in on the fact higher RPMs have...

Let’s focus in on the fact higher RPMs have an effect on your engine’s cooling system. There is only one main component in the cooling system related to engine speed and that is your water pump. The pump is powered by the drive belt which runs at the same speed as your engine. The water pump pushes the coolant through the engine, and cycles it through the radiator where a majority of the heat transfer (or cooling of the hot coolant) takes place.

The coolant is run through areas in the engine block where it picks up the heat from the combustion happening inside. From there the hot coolant is run through the radiator where its temperature is decreased, and then its ready to pick up more heat from the engine. If the coolant is not cycling through the engine, the cooling system will not work. The water pump can fail, as well as the pulley that drives it. I recommend further inspection of the coolant leak by a professional mechanic at this point.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My heater would not turn off at first and now my car is overheating. 2011 Dodge Nitro

Hi there. Typically when this occurs it is because there is a cooling system issue with the vehicle. It can be an issue with the coolant being low due to a leak or it can be caused by an issue...

Q: antifreeze leak

Hello, thank you for writing in. If the coolant looks like it is coming from the bottom of the water pump, this is a good sign it is to blame. With that being said, the water pump is almost one...

Q: My car drives in 1 and 2 but does not drive in d.. it does go into reverse Chevy Tahoe

Hello - most likely problem for this "no go" condition is a failure of the forward sprag (a one-way clutch) in the transmission. I would recommend a transmission inspection by a mobile, professional mechanic, such as one from YourMechanic, who...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...